1%{
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 * Released under the terms of the GNU GPL v2.0.
5 */
6
7#include <ctype.h>
8#include <stdarg.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include <stdbool.h>
13
14#define LKC_DIRECT_LINK
15#include "lkc.h"
16
17#include "zconf.hash.c"
18
19#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
20
21#define PRINTD		0x0001
22#define DEBUG_PARSE	0x0002
23
24int cdebug = PRINTD;
25
26extern int zconflex(void);
27static void zconfprint(const char *err, ...);
28static void zconf_error(const char *err, ...);
29static void zconferror(const char *err);
30static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);
31
32struct symbol *symbol_hash[257];
33
34static struct menu *current_menu, *current_entry;
35
36#define YYDEBUG 0
37#if YYDEBUG
38#define YYERROR_VERBOSE
39#endif
40%}
41%expect 26
42
43%union
44{
45	char *string;
46	struct file *file;
47	struct symbol *symbol;
48	struct expr *expr;
49	struct menu *menu;
50	struct kconf_id *id;
51}
52
53%token <id>T_MAINMENU
54%token <id>T_MENU
55%token <id>T_ENDMENU
56%token <id>T_SOURCE
57%token <id>T_CHOICE
58%token <id>T_ENDCHOICE
59%token <id>T_COMMENT
60%token <id>T_CONFIG
61%token <id>T_MENUCONFIG
62%token <id>T_HELP
63%token <string> T_HELPTEXT
64%token <id>T_IF
65%token <id>T_ENDIF
66%token <id>T_DEPENDS
67%token <id>T_REQUIRES
68%token <id>T_OPTIONAL
69%token <id>T_PROMPT
70%token <id>T_TYPE
71%token <id>T_DEFAULT
72%token <id>T_SELECT
73%token <id>T_RANGE
74%token <id>T_OPTION
75%token <id>T_ON
76%token <string> T_WORD
77%token <string> T_WORD_QUOTE
78%token T_UNEQUAL
79%token T_CLOSE_PAREN
80%token T_OPEN_PAREN
81%token T_EOL
82
83%left T_OR
84%left T_AND
85%left T_EQUAL T_UNEQUAL
86%nonassoc T_NOT
87
88%type <string> prompt
89%type <symbol> symbol
90%type <expr> expr
91%type <expr> if_expr
92%type <id> end
93%type <id> option_name
94%type <menu> if_entry menu_entry choice_entry
95%type <string> symbol_option_arg
96
97%destructor {
98	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
99		$$->file->name, $$->lineno);
100	if (current_menu == $$)
101		menu_end_menu();
102} if_entry menu_entry choice_entry
103
104%%
105input: stmt_list;
106
107stmt_list:
108	  /* empty */
109	| stmt_list common_stmt
110	| stmt_list choice_stmt
111	| stmt_list menu_stmt
112	| stmt_list T_MAINMENU prompt nl
113	| stmt_list end			{ zconf_error("unexpected end statement"); }
114	| stmt_list T_WORD error T_EOL	{ zconf_error("unknown statement \"%s\"", $2); }
115	| stmt_list option_name error T_EOL
116{
117	zconf_error("unexpected option \"%s\"", kconf_id_strings + $2->name);
118}
119	| stmt_list error T_EOL		{ zconf_error("invalid statement"); }
120;
121
122option_name:
123	T_DEPENDS | T_PROMPT | T_TYPE | T_SELECT | T_OPTIONAL | T_RANGE | T_DEFAULT
124;
125
126common_stmt:
127	  T_EOL
128	| if_stmt
129	| comment_stmt
130	| config_stmt
131	| menuconfig_stmt
132	| source_stmt
133;
134
135option_error:
136	  T_WORD error T_EOL		{ zconf_error("unknown option \"%s\"", $1); }
137	| error T_EOL			{ zconf_error("invalid option"); }
138;
139
140
141/* config/menuconfig entry */
142
143config_entry_start: T_CONFIG T_WORD T_EOL
144{
145	struct symbol *sym = sym_lookup($2, 0);
146	sym->flags |= SYMBOL_OPTIONAL;
147	menu_add_entry(sym);
148	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2);
149};
150
151config_stmt: config_entry_start config_option_list
152{
153	menu_end_entry();
154	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
155};
156
157menuconfig_entry_start: T_MENUCONFIG T_WORD T_EOL
158{
159	struct symbol *sym = sym_lookup($2, 0);
160	sym->flags |= SYMBOL_OPTIONAL;
161	menu_add_entry(sym);
162	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2);
163};
164
165menuconfig_stmt: menuconfig_entry_start config_option_list
166{
167	if (current_entry->prompt)
168		current_entry->prompt->type = P_MENU;
169	else
170		zconfprint("warning: menuconfig statement without prompt");
171	menu_end_entry();
172	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
173};
174
175config_option_list:
176	  /* empty */
177	| config_option_list config_option
178	| config_option_list symbol_option
179	| config_option_list depends
180	| config_option_list help
181	| config_option_list option_error
182	| config_option_list T_EOL
183;
184
185config_option: T_TYPE prompt_stmt_opt T_EOL
186{
187	menu_set_type($1->stype);
188	printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
189		zconf_curname(), zconf_lineno(),
190		$1->stype);
191};
192
193config_option: T_PROMPT prompt if_expr T_EOL
194{
195	menu_add_prompt(P_PROMPT, $2, $3);
196	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
197};
198
199config_option: T_DEFAULT expr if_expr T_EOL
200{
201	menu_add_expr(P_DEFAULT, $2, $3);
202	if ($1->stype != S_UNKNOWN)
203		menu_set_type($1->stype);
204	printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
205		zconf_curname(), zconf_lineno(),
206		$1->stype);
207};
208
209config_option: T_SELECT T_WORD if_expr T_EOL
210{
211	menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
212	printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
213};
214
215config_option: T_RANGE symbol symbol if_expr T_EOL
216{
217	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
218	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
219};
220
221symbol_option: T_OPTION symbol_option_list T_EOL
222;
223
224symbol_option_list:
225	  /* empty */
226	| symbol_option_list T_WORD symbol_option_arg
227{
228	struct kconf_id *id = kconf_id_lookup($2, strlen($2));
229	if (id && id->flags & TF_OPTION)
230		menu_add_option(id->token, $3);
231	else
232		zconfprint("warning: ignoring unknown option %s", $2);
233	free($2);
234};
235
236symbol_option_arg:
237	  /* empty */		{ $$ = NULL; }
238	| T_EQUAL prompt	{ $$ = $2; }
239;
240
241/* choice entry */
242
243choice: T_CHOICE T_EOL
244{
245	struct symbol *sym = sym_lookup(NULL, 0);
246	sym->flags |= SYMBOL_CHOICE;
247	menu_add_entry(sym);
248	menu_add_expr(P_CHOICE, NULL, NULL);
249	printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
250};
251
252choice_entry: choice choice_option_list
253{
254	$$ = menu_add_menu();
255};
256
257choice_end: end
258{
259	if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
260		menu_end_menu();
261		printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
262	}
263};
264
265choice_stmt: choice_entry choice_block choice_end
266;
267
268choice_option_list:
269	  /* empty */
270	| choice_option_list choice_option
271	| choice_option_list depends
272	| choice_option_list help
273	| choice_option_list T_EOL
274	| choice_option_list option_error
275;
276
277choice_option: T_PROMPT prompt if_expr T_EOL
278{
279	menu_add_prompt(P_PROMPT, $2, $3);
280	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
281};
282
283choice_option: T_TYPE prompt_stmt_opt T_EOL
284{
285	if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
286		menu_set_type($1->stype);
287		printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
288			zconf_curname(), zconf_lineno(),
289			$1->stype);
290	} else
291		YYERROR;
292};
293
294choice_option: T_OPTIONAL T_EOL
295{
296	current_entry->sym->flags |= SYMBOL_OPTIONAL;
297	printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
298};
299
300choice_option: T_DEFAULT T_WORD if_expr T_EOL
301{
302	if ($1->stype == S_UNKNOWN) {
303		menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
304		printd(DEBUG_PARSE, "%s:%d:default\n",
305			zconf_curname(), zconf_lineno());
306	} else
307		YYERROR;
308};
309
310choice_block:
311	  /* empty */
312	| choice_block common_stmt
313;
314
315/* if entry */
316
317if_entry: T_IF expr nl
318{
319	printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
320	menu_add_entry(NULL);
321	menu_add_dep($2);
322	$$ = menu_add_menu();
323};
324
325if_end: end
326{
327	if (zconf_endtoken($1, T_IF, T_ENDIF)) {
328		menu_end_menu();
329		printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
330	}
331};
332
333if_stmt: if_entry if_block if_end
334;
335
336if_block:
337	  /* empty */
338	| if_block common_stmt
339	| if_block menu_stmt
340	| if_block choice_stmt
341;
342
343/* menu entry */
344
345menu: T_MENU prompt T_EOL
346{
347	menu_add_entry(NULL);
348	menu_add_prompt(P_MENU, $2, NULL);
349	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
350};
351
352menu_entry: menu depends_list
353{
354	$$ = menu_add_menu();
355};
356
357menu_end: end
358{
359	if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
360		menu_end_menu();
361		printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
362	}
363};
364
365menu_stmt: menu_entry menu_block menu_end
366;
367
368menu_block:
369	  /* empty */
370	| menu_block common_stmt
371	| menu_block menu_stmt
372	| menu_block choice_stmt
373;
374
375source_stmt: T_SOURCE prompt T_EOL
376{
377	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
378	zconf_nextfile($2);
379};
380
381/* comment entry */
382
383comment: T_COMMENT prompt T_EOL
384{
385	menu_add_entry(NULL);
386	menu_add_prompt(P_COMMENT, $2, NULL);
387	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
388};
389
390comment_stmt: comment depends_list
391{
392	menu_end_entry();
393};
394
395/* help option */
396
397help_start: T_HELP T_EOL
398{
399	printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
400	zconf_starthelp();
401};
402
403help: help_start T_HELPTEXT
404{
405	current_entry->sym->help = $2;
406};
407
408/* depends option */
409
410depends_list:
411	  /* empty */
412	| depends_list depends
413	| depends_list T_EOL
414	| depends_list option_error
415;
416
417depends: T_DEPENDS T_ON expr T_EOL
418{
419	menu_add_dep($3);
420	printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
421}
422	| T_DEPENDS expr T_EOL
423{
424	menu_add_dep($2);
425	printd(DEBUG_PARSE, "%s:%d:depends\n", zconf_curname(), zconf_lineno());
426}
427	| T_REQUIRES expr T_EOL
428{
429	menu_add_dep($2);
430	printd(DEBUG_PARSE, "%s:%d:requires\n", zconf_curname(), zconf_lineno());
431};
432
433/* prompt statement */
434
435prompt_stmt_opt:
436	  /* empty */
437	| prompt if_expr
438{
439	menu_add_prompt(P_PROMPT, $1, $2);
440};
441
442prompt:	  T_WORD
443	| T_WORD_QUOTE
444;
445
446end:	  T_ENDMENU T_EOL	{ $$ = $1; }
447	| T_ENDCHOICE T_EOL	{ $$ = $1; }
448	| T_ENDIF T_EOL		{ $$ = $1; }
449;
450
451nl:
452	  T_EOL
453	| nl T_EOL
454;
455
456if_expr:  /* empty */			{ $$ = NULL; }
457	| T_IF expr			{ $$ = $2; }
458;
459
460expr:	  symbol				{ $$ = expr_alloc_symbol($1); }
461	| symbol T_EQUAL symbol			{ $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
462	| symbol T_UNEQUAL symbol		{ $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
463	| T_OPEN_PAREN expr T_CLOSE_PAREN	{ $$ = $2; }
464	| T_NOT expr				{ $$ = expr_alloc_one(E_NOT, $2); }
465	| expr T_OR expr			{ $$ = expr_alloc_two(E_OR, $1, $3); }
466	| expr T_AND expr			{ $$ = expr_alloc_two(E_AND, $1, $3); }
467;
468
469symbol:	  T_WORD	{ $$ = sym_lookup($1, 0); free($1); }
470	| T_WORD_QUOTE	{ $$ = sym_lookup($1, 1); free($1); }
471;
472
473%%
474
475void conf_parse(const char *name)
476{
477	struct symbol *sym;
478	int i;
479
480	zconf_initscan(name);
481
482	sym_init();
483	menu_init();
484	modules_sym = sym_lookup(NULL, 0);
485	modules_sym->type = S_BOOLEAN;
486	modules_sym->flags |= SYMBOL_AUTO;
487	rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
488
489#if YYDEBUG
490	if (getenv("ZCONF_DEBUG"))
491		zconfdebug = 1;
492#endif
493	zconfparse();
494	if (zconfnerrs)
495		exit(1);
496	if (!modules_sym->prop) {
497		struct property *prop;
498
499		prop = prop_alloc(P_DEFAULT, modules_sym);
500		prop->expr = expr_alloc_symbol(sym_lookup("MODULES", 0));
501	}
502	menu_finalize(&rootmenu);
503	for_all_symbols(i, sym) {
504		if (sym_check_deps(sym))
505			zconfnerrs++;
506        }
507	if (zconfnerrs)
508		exit(1);
509	sym_set_change_count(1);
510}
511
512const char *zconf_tokenname(int token)
513{
514	switch (token) {
515	case T_MENU:		return "menu";
516	case T_ENDMENU:		return "endmenu";
517	case T_CHOICE:		return "choice";
518	case T_ENDCHOICE:	return "endchoice";
519	case T_IF:		return "if";
520	case T_ENDIF:		return "endif";
521	case T_DEPENDS:		return "depends";
522	}
523	return "<token>";
524}
525
526static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken)
527{
528	if (id->token != endtoken) {
529		zconf_error("unexpected '%s' within %s block",
530			kconf_id_strings + id->name, zconf_tokenname(starttoken));
531		zconfnerrs++;
532		return false;
533	}
534	if (current_menu->file != current_file) {
535		zconf_error("'%s' in different file than '%s'",
536			kconf_id_strings + id->name, zconf_tokenname(starttoken));
537		fprintf(stderr, "%s:%d: location of the '%s'\n",
538			current_menu->file->name, current_menu->lineno,
539			zconf_tokenname(starttoken));
540		zconfnerrs++;
541		return false;
542	}
543	return true;
544}
545
546static void zconfprint(const char *err, ...)
547{
548	va_list ap;
549
550	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
551	va_start(ap, err);
552	vfprintf(stderr, err, ap);
553	va_end(ap);
554	fprintf(stderr, "\n");
555}
556
557static void zconf_error(const char *err, ...)
558{
559	va_list ap;
560
561	zconfnerrs++;
562	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
563	va_start(ap, err);
564	vfprintf(stderr, err, ap);
565	va_end(ap);
566	fprintf(stderr, "\n");
567}
568
569static void zconferror(const char *err)
570{
571#if YYDEBUG
572	fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
573#endif
574}
575
576void print_quoted_string(FILE *out, const char *str)
577{
578	const char *p;
579	int len;
580
581	putc('"', out);
582	while ((p = strchr(str, '"'))) {
583		len = p - str;
584		if (len)
585			fprintf(out, "%.*s", len, str);
586		fputs("\\\"", out);
587		str = p + 1;
588	}
589	fputs(str, out);
590	putc('"', out);
591}
592
593void print_symbol(FILE *out, struct menu *menu)
594{
595	struct symbol *sym = menu->sym;
596	struct property *prop;
597
598	if (sym_is_choice(sym))
599		fprintf(out, "choice\n");
600	else
601		fprintf(out, "config %s\n", sym->name);
602	switch (sym->type) {
603	case S_BOOLEAN:
604		fputs("  boolean\n", out);
605		break;
606	case S_TRISTATE:
607		fputs("  tristate\n", out);
608		break;
609	case S_STRING:
610		fputs("  string\n", out);
611		break;
612	case S_INT:
613		fputs("  integer\n", out);
614		break;
615	case S_HEX:
616		fputs("  hex\n", out);
617		break;
618	default:
619		fputs("  ???\n", out);
620		break;
621	}
622	for (prop = sym->prop; prop; prop = prop->next) {
623		if (prop->menu != menu)
624			continue;
625		switch (prop->type) {
626		case P_PROMPT:
627			fputs("  prompt ", out);
628			print_quoted_string(out, prop->text);
629			if (!expr_is_yes(prop->visible.expr)) {
630				fputs(" if ", out);
631				expr_fprint(prop->visible.expr, out);
632			}
633			fputc('\n', out);
634			break;
635		case P_DEFAULT:
636			fputs( "  default ", out);
637			expr_fprint(prop->expr, out);
638			if (!expr_is_yes(prop->visible.expr)) {
639				fputs(" if ", out);
640				expr_fprint(prop->visible.expr, out);
641			}
642			fputc('\n', out);
643			break;
644		case P_CHOICE:
645			fputs("  #choice value\n", out);
646			break;
647		default:
648			fprintf(out, "  unknown prop %d!\n", prop->type);
649			break;
650		}
651	}
652	if (sym->help) {
653		int len = strlen(sym->help);
654		while (sym->help[--len] == '\n')
655			sym->help[len] = 0;
656		fprintf(out, "  help\n%s\n", sym->help);
657	}
658	fputc('\n', out);
659}
660
661void zconfdump(FILE *out)
662{
663	struct property *prop;
664	struct symbol *sym;
665	struct menu *menu;
666
667	menu = rootmenu.list;
668	while (menu) {
669		if ((sym = menu->sym))
670			print_symbol(out, menu);
671		else if ((prop = menu->prompt)) {
672			switch (prop->type) {
673			case P_COMMENT:
674				fputs("\ncomment ", out);
675				print_quoted_string(out, prop->text);
676				fputs("\n", out);
677				break;
678			case P_MENU:
679				fputs("\nmenu ", out);
680				print_quoted_string(out, prop->text);
681				fputs("\n", out);
682				break;
683			default:
684				;
685			}
686			if (!expr_is_yes(prop->visible.expr)) {
687				fputs("  depends ", out);
688				expr_fprint(prop->visible.expr, out);
689				fputc('\n', out);
690			}
691			fputs("\n", out);
692		}
693
694		if (menu->list)
695			menu = menu->list;
696		else if (menu->next)
697			menu = menu->next;
698		else while ((menu = menu->parent)) {
699			if (menu->prompt && menu->prompt->type == P_MENU)
700				fputs("\nendmenu\n", out);
701			if (menu->next) {
702				menu = menu->next;
703				break;
704			}
705		}
706	}
707}
708
709#include "lex.zconf.c"
710#include "util.c"
711#include "confdata.c"
712#include "expr.c"
713#include "symbol.c"
714#include "menu.c"
715